pdist2 with wrapping
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I have a square area of gridpoints and I'm trying to create a graph where each point is joined to its neighbouring points based on a Chebychev distance. From an earlier question here, I have the following methodology:
M = 50; N = 50;
[I,J] = ndgrid(1:M,1:N);
IJ = [I(:),J(:)];
[W,K] = pdist2(IJ,IJ,'chebychev','Smallest',9);
From here, columns of W containing only 1 can be selected and can be matched with columns of K to get the adjacency matrix. In this case however, I want to create a graph where the edges of the square are wrapped, that is, the leftmost (or topmost) points are also connected to the rightmost (or bottommost) points. How can I add this condition in pdist2?
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Rik
2021 年 1 月 21 日
You could maybe modify the internal code of pdist2, but you should not do that. The easiest way here is to just create copies of your array with repmat. Don't forget to remove the padding from the result as well.
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